package com.atguigu.gulimall.ware.service.impl;

import com.atguigu.common.constant.WareConstant;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;
import com.atguigu.gulimall.ware.dao.PurchaseDao;
import com.atguigu.gulimall.ware.entity.PurchaseDetailEntity;
import com.atguigu.gulimall.ware.entity.PurchaseEntity;
import com.atguigu.gulimall.ware.service.PurchaseDetailService;
import com.atguigu.gulimall.ware.service.PurchaseService;
import com.atguigu.gulimall.ware.service.WareSkuService;
import com.atguigu.gulimall.ware.vo.MergeVo;
import com.atguigu.gulimall.ware.vo.PurchaseDoneItemVo;
import com.atguigu.gulimall.ware.vo.PurchaseDoneVo;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Service("purchaseService")
public class PurchaseServiceImpl extends ServiceImpl<PurchaseDao, PurchaseEntity> implements PurchaseService {

    @Autowired
    private PurchaseDetailService purchaseDetailService;

    @Autowired
    private WareSkuService wareSkuService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<PurchaseEntity> page = this.page(
                new Query<PurchaseEntity>().getPage(params),
                new QueryWrapper<PurchaseEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public PageUtils queryPageUnreceivePurchase(Map<String, Object> params) {
        LambdaUpdateWrapper<PurchaseEntity> lqw = new LambdaUpdateWrapper<>();
        lqw.eq(PurchaseEntity::getStatus, 0).or().eq(PurchaseEntity::getStatus, 1);
        IPage<PurchaseEntity> page = this.page(new Query<PurchaseEntity>().getPage(params), lqw);

        return new PageUtils(page);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void mergePurchase(MergeVo mergeVo) {
        Long purchaseId = mergeVo.getPurchaseId();
        if (purchaseId == null) {
            //新建
            PurchaseEntity purchaseEntity = new PurchaseEntity();
            purchaseEntity.setStatus(WareConstant.PurchaseStatrsEnum.CREATED.getCode());
            purchaseEntity.setCreateTime(new Date());
            purchaseEntity.setUpdateTime(new Date());
            this.save(purchaseEntity);
            purchaseId = purchaseEntity.getId();

        }
        //TODO 确认采购单状态是0和1才可以合并

        List<Long> items = mergeVo.getItems();
        Long finalPurchaseId = purchaseId;
        List<PurchaseDetailEntity> collect = items.stream().map(i -> {
            PurchaseDetailEntity purchaseDetailEntity = new PurchaseDetailEntity();

            purchaseDetailEntity.setId(i);
            purchaseDetailEntity.setPurchaseId(finalPurchaseId);
            purchaseDetailEntity.setStatus(WareConstant.PurchaseDetailStatrsEnum.ASSIGNED.getCode());
            return purchaseDetailEntity;
        }).collect(Collectors.toList());

        purchaseDetailService.updateBatchById(collect);

        PurchaseEntity purchaseEntity = new PurchaseEntity();
        purchaseEntity.setId(purchaseId);
        purchaseEntity.setUpdateTime(new Date());
        this.updateById(purchaseEntity);

    }

    @Override
    public void received(List<Long> ids) {
        //1.确认当前采购单是新建或者分配状态
        List<PurchaseEntity> collect = ids.stream().map(i -> {
            PurchaseEntity purchaseEntity = this.getById(i);
            return purchaseEntity;
        }).filter(f -> {
            if (f.getStatus() == WareConstant.PurchaseStatrsEnum.CREATED.getCode() || f.getStatus() == WareConstant.PurchaseStatrsEnum.ASSIGNED.getCode()) {
                return true;
            } else {
                return false;
            }
        }).map(m -> {
            m.setStatus(WareConstant.PurchaseStatrsEnum.RECEIVE.getCode());
            m.setUpdateTime(new Date());
            return m;
        }).collect(Collectors.toList());

        //2.改变采购单状态
        this.updateBatchById(collect);
        //3.改变采购单的状态
        collect.forEach(c -> {
            List<PurchaseDetailEntity> entities = purchaseDetailService.listDetailByPurchaseId(c.getId());
            List<PurchaseDetailEntity> detailEntities = entities.stream().map(e -> {
                PurchaseDetailEntity purchaseDetailEntity = new PurchaseDetailEntity();
                purchaseDetailEntity.setId(e.getId());
                purchaseDetailEntity.setStatus(WareConstant.PurchaseDetailStatrsEnum.BUYING.getCode());
                return purchaseDetailEntity;
            }).collect(Collectors.toList());
            purchaseDetailService.updateBatchById(detailEntities);
        });

    }

    @Override
    public void done(PurchaseDoneVo doneVo) {
        //1.该变采购单状态
        Long id = doneVo.getId();
        //2.改变采购项的状态
        Boolean flag = true;
        List<PurchaseDoneItemVo> items = doneVo.getItems();
        List<PurchaseDetailEntity> updates = new ArrayList<>();
        for (PurchaseDoneItemVo item : items) {
            PurchaseDetailEntity detailEntity = new PurchaseDetailEntity();
            if (item.getStatus() == WareConstant.PurchaseDetailStatrsEnum.HASERROR.getCode()) {
                flag = false;
                detailEntity.setStatus(item.getStatus());
            } else {
                detailEntity.setStatus(WareConstant.PurchaseDetailStatrsEnum.FINISH.getCode());
                //3.将成功采购的入库
                PurchaseDetailEntity entity = purchaseDetailService.getById(item.getItemId());
                
                wareSkuService.addStock(entity.getSkuId(), entity.getWareId(), entity.getSkuNum());
            }
            detailEntity.setId(item.getItemId());

            updates.add(detailEntity);
        }
        purchaseDetailService.updateBatchById(updates);

        PurchaseEntity purchaseEntity = new PurchaseEntity();
        purchaseEntity.setId(id);
        purchaseEntity.setStatus(flag ? WareConstant.PurchaseStatrsEnum.FINISH.getCode() : WareConstant.PurchaseStatrsEnum.HASERROR.getCode());
        purchaseEntity.setUpdateTime(new Date());
        this.updateById(purchaseEntity);

    }

}